Comment 1 for bug 791322

 g++ -DHAVE_CONFIG_H -I../../../src -I../../../data -I../../../../src -I/usr/include/Inventor/annex -D_REENTRANT -I/usr/share/qt4/include -I/usr/share/qt4/include/Qt -DSOQT_DEBUG=1 -DSOQT_INTERNAL -g -O2 -W -Wall -Wno-unused -Wno-multichar -Woverloaded-virtual -Wno-non-virtual-dtor -fno-builtin -finline-functions -Wreturn-type -Wchar-subscripts -Wparentheses -c ../../../../src/Inventor/Qt/SoQtGLWidget.cpp -fPIC -DPIC -o .libs/SoQtGLWidget.o
In file included from /usr/include/GL/glx.h:45:0,
                 from ../../../../src/Inventor/Qt/SoQtGLWidget.cpp:1288:
/usr/include/GL/gl.h:168:17: error: conflicting declaration 'typedef double GLdouble'
/usr/share/qt4/include/Qt/qgl.h:74:17: error: 'GLdouble' has a previous declaration as 'typedef GLfloat GLdouble'
In file included from /usr/include/GL/gl.h:2091:0,
                 from /usr/include/GL/glx.h:45,
                 from ../../../../src/Inventor/Qt/SoQtGLWidget.cpp:1288:
/usr/include/GL/glext.h:5040:19: error: conflicting declaration 'typedef ptrdiff_t GLintptr'
/usr/include/GLES2/gl2.h:38:26: error: 'GLintptr' has a previous declaration as 'typedef khronos_intptr_t GLintptr'
/usr/include/GL/glext.h:5041:19: error: conflicting declaration 'typedef ptrdiff_t GLsizeiptr'
/usr/include/GLES2/gl2.h:39:26: error: 'GLsizeiptr' has a previous declaration as 'typedef khronos_ssize_t GLsizeiptr'
make[9]: *** [SoQtGLWidget.lo] Error 1

Again - OpenGL instead of OpenGLES?